Probe sensor for Dagoma Dicovery200 3D printer

thingiverse

The sensor is based on a simple mouse microswitch. The finger is released and goes down during the X homing, no extra gcode is needed for this. After homing X, Y, and Z, a Z movement down lifts the finger and re-arms it for another use. This movement needs an extra gcode to lower the head. Two options: place a coin or a button cell on the build plate (2 or 3 mm thick), which will be the contact area for re-arming; or position the head outside the build plate, allowing the nozzle to move below Z0 and the plate to lift the finger. To make this sensor, you need: A microswitch from a computer mouse A bicycle spoke with a diameter of 2 mm, cut to 75 mm, keeping the threaded end for fixing the head button A spring like those found in pens An electrical connection block to keep the spring on the spoke A piece of double-sided tape to hold the arming stick A piece of foam as a lever spring This is a probe sensor for the Dagoma Discovery 200 3D printer. It replaces the inductive sensor and does not require a power supply. The dowel goes down and is activated when X homing, no extra gcode is needed. After homing X, Y, and Z, a Z movement down lifts the dowel and re-arms it for another use. This movement needs an extra gcode to lower the hot-end. Two possibilities: Stick a coin or button cell on the build plate (2 or 3 mm thick), which will be the contact area for re-arming; Position the head outside the build plate area (y = 205 mm), allowing the nozzle to move under Z0 and the plate to lift the dowel. For building this sensor, we need: A microswitch (12.7 x 5.7mm) commonly found in computer mice A bicycle spoke with a diameter of 2 mm cut to 75 mm, keeping the threaded end for fixing the head button A spring like those found in pens An electrical connection block to keep the spring on the spoke A piece of double-sided tape to hold the arming stick A piece of foam as a lever spring